tert-butyl (R)-4-ethynyl-2,2-dimethyloxazolidine-3-carboxylate
2-tert-butoxycarbonylamino-1-buten-3-yne
(R)-(E)-4-(2-bromoethenyl)-2,2-dimethyl-3-oxazolidinecarboxylic acid 1,1-dimethylethyl ester
tert-butyl (4R)-2,2-dimethyl-4-(3-oxo-3-phenyl-1-propynyl)-1,3-oxazolane-3-carboxylate
tert-butyl [3-methyl-5-phenyl-4-(phenylethynyl)phenyl]-N-methylcarbamate